Look at those baby blues! Baby Axel is the star of the cutest tweet of the day!

If this picture doesn’t have you smiling, we don’t know what will. It’s Always Sunny in Philadelphia star Kaitlin Olson, 35, tweeted this precious picture of her 5-month-old son Axel Lee, whose daddy is her co-star and hubby Rob McElhenney. We just want to pinch those cheeks!